HD6432646 Hitachi, HD6432646 Datasheet - Page 680

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

H8S/2648, H8S/2648R, H8S/2647
The relationship between the LCD RAM and the display segments differs according to the duty
cycle. LCD RAM maps for the different duty cycles are shown in figures 18-7 to 18-10.
After setting the registers required for display, data is written to the part corresponding to the duty
using the same kind of instruction as for ordinary RAM, and display is started automatically when
turned on. Word- or byte-access instructions can be used for RAM setting.
646
H'FC40
H'FC53
SEG40
COM4
SEG2
Bit 7
Figure 18-7 LCD RAM Map (1/4 Duty)
SEG40 SEG40 SEG40
COM3
SEG2
Bit 6
COM2
SEG2
Bit 5
COM1
SEG2
Bit 4
SEG39
COM4
SEG1
Bit 3
SEG39
COM3
SEG1
Bit 2
SEG39 SEG39
COM2
SEG1
Bit 1
COM1
SEG1
Bit 0